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Managing potassium for crop production

A corn crop takes up nearly as much potassium (K) as it does nitrogen (N), yet management of each nutrient is entirely different. Whereas harvesting 125 bushels of corn grain per acre removes only 35 lbs of potash (K2O), harvesting 21 tons of silage per acre carries away 160 lbs of K2O; and the voracious appetite of a 5-ton per-acre alfalfa crop takes 230 lbs of K2O per acre from a field.

Potassium Requirements of Pulse Crops | Ch. Srinivasarao, Masood Ali, A.N. Ganeshamurthy, and K.K.

In India, pulses are grown mostly on marginal and sub-marginal lands without proper inputs. Many field experiments on various pulse crops show yield benefits from K application. Improved K supply also enhances biological nitrogen (N) fixation and protein content of pulse grains.



Fertigation in micro-irrigated horticultural crops: vegetables | Salvadore J. Locascio

Fertigation is the application of soluble nutrients via the irrigation water; its use in vegetable production has increased with the introduction of polyethylene mulch and drip irrigation, and it is an efficient means to apply fertilizer to the root zone.

Effects of fertigation regime on blossom end rot of vegetable fruits | Asher Bar-Tal and Benny Aloni

The relationships between blossom end rot (BER) of vegetable fruits and fertigation regimes are reviewed. Many fruit disorders are affected by nutrient deficiencies or unbalanced nutrition: BER, gold specks, green back, blotchy ripening, color spots, malformation, hollowness and fruit cracking.

Boosting seed cotton yields in punjab with potassium | M.S. Brar and K.N. Tiwari

Cotton production in India has stagnated at a level far below its potential - the main reason being unbalanced and low rates of fertilizers. A review of key research on improved potassium (K) management practices provides a clear picture of the potential yield and economic benefits available to farmers.

How potassium nutrition can suppress soybean aphids | Tom Bruulsema, Christina DiFonzo and Claudio Gratton

The soybean aphid has become the most important insect pest of soybeans in the North- east and Midwest regions of North America. It often damages soybean  plants that  are K-deficient more than  those  that  are not.

Effect of fertigation strategy on nitrate availability and nitrate leaching under micro-irrigation | Blaine Hanson, Jan Hopmans and Jirka Simunek

Micro-irrigation has the potential of precisely applying water and fertilizer both in location and in quantity. Fertigation is the process of applying fertilizers through the irrigation water. However, under micro-irrigation, soil water content, root distribution, and solute concentration vary spatially around the drip line.

Potassium Nutrition of cotton | K. Raja Reddy, Harry F. Hodges and Jac Varco

Knowledge of potassium (K) requirements for cotton growth and development is needed for efficient production. Fertilization of cotton with K is a complex issue, because soils vary widely in terms of K-supplying capacity and K fertilizer adsorption.

Foliar potassium improves cantaloupe marketable and nutritional quality | G.E. Lester, J.L. Jifon, and W.M. Stewart

Potassium is important in optimizing both crop yield and economic quality. Root activity and K uptake are generally reduced during the reproductive phase of crop development.

The positive impact of potassium nitrate on wheat yield | Adriano Altissimo

The field trial results statistically and strongly supported the hypothesis that foliar application of potassium nitrate produces higher yield 


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