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By Dr. Wes Chun Ph.D. 
Grower's Secret, Chief Science Officer

Applying fertilizers pre-plant and at-planting are beneficial practices to restore soil fertility and grow a successful crop.  Pre-plant fertilizers are applied before planting seeds or seedlings into the field or into nursery potting media.  At-planting fertilizers are applied during planting.  These practices provide ready access to nutrients that are vital for seedling establishment and health.  Proper fertilizer choice and placement are essential for maximizing the benefits of pre- and at- planting fertilizers

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By Dr. Wes Chun Ph.D. 
Grower's Secret, Chief Science Officer

For many crops, post-harvest (the period after harvest and before leaf senescence) fertilization can play an important role in the following season crop. In many tree crops, it is one of the best times of the season for uptake of nitrogen and potassium. Trees are still active, and the roots and foliage readily absorb applied nutrients. These nutrients become reserves for the following growing season.  While there may be little difference in tree productivity between fall and spring fertilizer applications, it may be better to fertilize in the fall. Fall applications are more efficient since trees are still actively taking up nutrients, cold and wet conditions in the spring can delay dormancy break, and spring-applied fertilizers are subject to leaching and runoff.

potassium, rice

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Potassium Requirements and Fertilization of Rice and Irrigated Soybeans

The University of Arkansas has published a report on potassium's effects and requirement for fertilizing rice and soybeans. In this informative report learn about:


  • Potassium Deficiency Symptoms
  • Sampling Soil for K
  • Interpreting Soil Tests
  • K Fertilizer Rates
  • Soybean and Rice Nutrient Content