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Barley yield

There are many reports of the beneficial effects on plant growth of applying organic wastes to land. Brechin and McDonald [5] demonstrated that pig slurry was as effective in increasing barley yield as conventional inorganic fertiliser. The major benefit appeared to be the increase in N concentration of the barley plant. [Pg.466]

Yields of barley can be more variable than yields of winter wheat. Spring barley grain yields are nsnally abont It/ha lower than these for winter barley. Barley yields are shown in Table 13.15. [Pg.329]

Many crop yields have significantly increased since the 1960s. Wheat and barley yielded similarly in 1966 at around 4 tonnes/hectare (t/ha). Yields increased steadily right up to the late 1990s with most improvement in the yield of wheat. Since the late 1990s yields have plateaued (Fig. 0.3) despite improvements in varieties and crop husbandry and a small increase in atmospheric carbon dioxide. [Pg.618]

Malting and milling of barley yield a variety of products which differ widely in their nutrient compositions. Food Composition Table F-21 gives nutrient data for selected barley products. [Pg.86]

Plant and Animal Nutrient. Copper is one of seven micronutrients that has been identified as essential to the proper growth of plants (87). Cereal crops are by far the most affected by copper deficiency (see Wheat and other cereal grains). Greenhouse studies have shown yield increases from 38% to over 500% for wheat, barley, and oats (88) using copper supplementation. A tenfold increase in the yield of oats was reported in France (89). Symptoms of copper deficiency vary depending on species, but often it is accompanied by withering or chlorosis in the leaves that is not ammenable to iron supplementation. In high concentrations, particularly in low pH sods, copper can be toxic to plants. [Pg.258]

Thermoplastic xylan derivatives have been prepared by in-hne modification with propylene oxide of the xylan present in the alkaline extract of barley husks [424,425]. Following peracetylation of the hydroxypropylated xylan in formamide solution yielded the water-insoluble acetoxypropyl xylan. The thermal properties of the derivative quahfy this material as a potential biodegradable and thermoplastic additive to melt-processed plastics. Xylan from oat spelts was oxidized to 2,3-dicarboxyhc derivatives in a two-step procedure using HI04/NaC102 as oxidants [426]. [Pg.52]

Grumet, R., Albrechtson, R.S. Hanson, A.D. (1987). Growth and yield of barley isopopulations differing in solute potential. Crop Science, 27, 991-5. [Pg.152]

Ceccarelli, S. (1987). Yield potential and drought tolerance of segregating populations of barley in contrasting environments. Euphytica, 36, 265-73. [Pg.212]

A sound crop rotational system is of basic importance to the organic farmer. It reduces the risk of diseases and pests associated with monoculture, gives better control of weeds, spreads the labour requirements more evenly over the year, reduces the financial risk if one crop yields or sells badly and provides more interest for the farmer. For instance, take-all is a disease that cannot even be controlled chemically. Winter crops are more susceptible to take-all than spring sown crops and wheat is more susceptible than barley, so the safest position for winter wheat is immediately after a break crop. [Pg.79]

Winter barley is an ideal entry for oilseed rape because the earlier harvest allows early drilling of rape. It has been shown on organic farms that building up fertility by using a green manure crop, such as red clover, has paid off financially, with the subsequent boost in yield of the following cereal crop. [Pg.80]

A ready reckoner for the amount of N, P and K removed by certain representative crops is shown in Table 5.2. The requirement for P and K may be expressed in terms of the element rather than the oxide (P205 or K20). P205 contains 0.43 units of P K20 contains 0.83 units of K. The depletion of N, P and K from the grain of wheat, barley and oats is pro rata for yield, but the nutrient composition of the straw is different, oat straw containing very much more potassium than wheat or barley straw. Potatoes and kale are very much more exhaustive of N and K than the cereal crops. [Pg.81]

The commonest type is a mixture of barley and oats. The yield of grain is usually better than if either crop was grown alone, but care must be taken to choose varieties which ripen at the same time. [Pg.90]

Wheat, barley Protein stability during storage, low producer price Food crops, lower yields, more difficult to transform and manipulate... [Pg.193]


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