Value of crops

Agricultural products are often subjected to dehydration to improve storage stability grains, and seeds are typical examples. Critical moisture contents must be achieved so that these products can be stored safely. This is closely related to the economic value of crops... 

Reed, J.D. Capper, B.S. and P.J.H. Neate (1988) Plant breeding and the nutritive value of crop residues.- Workshop proceedings. ILCA, Addis Ababa. 

Dandekar, A. M. and N. Gutterson, 2000, Genetic engineering to improve quahty, productivity, and value of crops, Calif. Agric. 54(4) 49-56 (July-August). 

In addition to the 16 essential elements listed in Table 1.1, some other elements have been shown, in certain circumstances, to be helpful in increasir crop yields or in improving the value of crops for animal or human nutrition. Examples are sodium, silicon, cobalt, and vanadium. 

In the early part of the 20th century, several longterm experiments were, conducted in the United States with ground phosphate rocks in Tennessee, which is one of the less reactive sedimentary rocks. Hopldns has reported results from experiments in four states of the United States that show the increased value of crops... 

The production projections are made by estimating net and gross cumulative investment for the projected period to allow assessment of the macroeconomic proportions. The gross value of crops is calculated and inputs are analyzed. The crop production growth is estimated by assessment of the sources of growth such as yield per hectare, arable land growth, and cropping intensity. This produces projected crops and, in particular, cereal yield per hectare. 

Hancock, R.D., Viola, R., 2005. Improving the nutritional value of crops through enhancement of L-ascorbic acid (vitamin C) content rationale and biotechnological opportunities. Journal of Agricultural and Food Chemistry 53 (13), 5248-5257. 

The sustained world popularity of NSP results from simplicity of production and high agronomic quaHty as a carrier of available P2O5, calcium, sulfur, and usually some incidental micronutrients. In terms of agronomic value for large numbers of crops, no phosphate fertilizer has been shown to be superior to NSP. It is likely to remain in strong demand in parts of the world where simplicity of production or sulfur fertilization has high priority and where transportation costs are not prohibitive. 

Fig. 1. United States agricultural crop markets for manufactured controlled release fertilizers, 1990. (a) Total percentage ( 14 million) of market value by crop and (b) total percentage (6,800 t) of consumption by product type. IBDU is isobutyUdene diurea PCF, polymer-coated fertilizer UF,...

Exxon Chemical Canada is currently test marketing this developmental technology on a number of appHcations including high value vegetable crop, turf, and ornamental nurseries. 

Currently, HVI systems are providing rehable information on six characteristics of quaUty from a cotton sample in approximately 30 s that are highly related to the spinning quaUty and market value of the cotton. As of the 1991 crop year, cotton must be tested by HVI to be eligible for price supports in the United States. Information on every bale of cotton should gready improve the marketing of cotton and encourage the production of cotton with fiber properties desired by users. 

A food processing establishment in a facility processes crops grown at the facility in a separate establishment. The facility could base the value of the products of each establishment on the total production value of each establishment. Alternatively, the facility could determine the value of the crops grown at the agricultural establishment. Then, to calculate the contribution of the food processing establishment, the facility would subtract the crop value from the total value of the product shipped from the processing establishment. 

CBA relies heavily on the costs of environmental impacts. Some impacts may be easily expressed in monetary values, like crop loss or even increased morbidity among people. Others, like impact on biodiversity and the depletion of natural resources, are more difficult to describe in terms of monetary values. Large time scales and global impacts also complicate the methodology and confuse the understanding of the results. Some of the environmental consequences of today s activities appear only after several hundred or thousand yeats. Even low interest rates tend to diminish these types of impact, even if they are very large. 

The terms of crop purchase will be negotiated prior to the first application and cannot change with market values. 

The limit of detection (LOD) is an important criterion of the efficiency of an analytical method. It is characterized by the smallest value of the concentration of a compound in the analytical sample. The detectable amount of anilide compounds is in the range 0.01-0.5 ng by GC and 0.1 ng by HPLC. The limit of quantitation (LOQ) ranges from 0.005 to 0.01 mg kg for vegetables, fruits and crops. The recoveries from untreated plant matrices with fortification levels between 10 and 50 times the LOD and the LOQ are 70-120%. The relative standard deviation (RSD) at 10-50 times the level of the LOD and LOQ are <10 % and <20%, respectively. 

The LOD is an important criterion of the efficiency of an analytical method. It defines the smallest value of the concentration of a compound in the analytical sample. Detectable amounts of neonicotinoid insecticides range from 0.5 to 1 ng by HPLC. The LOQ ranges from 0.005 to 0.01 mg kg for vegetables, fruits and crops. 

The value of all herbicides for crops marketed worldwide in 1980 was estimated at about 4.9 billion (17). The sale of herbicides for weed control in corn in the United States represented 70 and 49% of the world herbicide and pesticide purchases in corn, respectively. The sale of herbicides in soybeans represents 82 and 69% of the world herbicide and pesticide purchases in soybeans, respectively. The sale of herbicides for weed control in row crops in the United States represents 62 and 36% of the world herbicide and pesticide purchases for row crops, respectively. 

Weeds are an enormous problem affecting field crops in the Mid-South. They reduce yields, increase the cost of production, reduce the quality of the harvested produce, and decrease the value of the marketed product. These effects of weeds are present wherever crops are grown however, they seem to be more devastating... 

The 1946 cooperative control program against grasshoppers saved crops on 5,666,000 acres at an estimated value of 41,000,000. For each dollar spent 52 worth of crops was saved. 

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