Transcription of Crop Nutrient Needs in the South and Southwest …
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Crop Nutrient Needs in the South and Southwest …
B-6053. 04-01. Crop Nutrient Needs in South and Southwest Texas Charles Stichler and Mark McFarland*. Crop fertilization is not an exact science. The through crop uptake, leaching losses, or denitri- soil is a dynamic, changing, and complex fication (loss to the atmosphere). mixture of organic matter, minerals, insects, Fertilizer use efficiency the conversion nematodes, bacteria, fungi, water, and of nutrients into crop yields also changes gasses. Any change in one or more of these with yield. Low yields require fewer factors can change the availability of nutri- nutrients per pound of production than ents to plants. Much is known about how soils high yields. As the maximum yield for a and soil nutrients respond to these crop in an area is reached, the plant changes, but no one can predict precise- does not use nutrients as efficiently; so ly which changes will occur. Fertility more nutrients are required to produce recommendations for essential plant each additional pound of yield.
3 Table 4. Approximate Nutrient Requirements for Grain Sorghum Based on Stage of Growth for a Yield of 7,500 Pounds per Acre.* Days After Nitrogen
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