D. Huber - Academia.edu (original) (raw)

Papers by D. Huber

Journal of Plant Nutrition, 1995

ABSTRACT An understanding of nitrogen (N) interactions with plant growth and metabolism is import... more ABSTRACT An understanding of nitrogen (N) interactions with plant growth and metabolism is important in order to increase the efficiency of fertilizer amendments for crop production. This study was initiated to evaluate the effect of the form of N and buffering with calcium carbonate (CaCO3) on the activity of ammonium (NH4) assimilating enzymes in a maize hybrid, a GDH‐deficient mutant, and the N6 normal inbred the mutant was derived from. Plants were grown in a growth chamber in sand culture with 10 mM of the different N forms [nitrate (NO3), NH4, ammonium nitrate (NH4STO3), and NH4 plus CaCO3). Hybrid plants grown in the unbuffered NH4 were much smaller than those grown in NO3 as the only source of N, but had comparable growth with each source of nitrogen if the pH was controlled. In contrast, a glutamate dehydrogenase‐deficient mutant (GDH) inbred and its normal control grew almost as well on both NH4 treatments as on NO3. GDH activity was higher in plants grown with NH4 than NO3, and it was almost nil in tissue of the GDH deficient mutant. Glutamine synthetase (GS) activity was lower in the unbuffered NH4 treatment (acid pH) and increased significantly when CaCO3 was added to the NH4. Ammonium, as a sole source of N, induced a higher concentration of free ammonium and most free amino acids in plant tissues than NO3.

Applied Engineering in Agriculture, 1986

Agronomy Journal, 1975

Large overwinter losses of fall‐applied fertilizer N from midwestern U.S. soils occur through lea... more Large overwinter losses of fall‐applied fertilizer N from midwestern U.S. soils occur through leaching and denitrification. These losses result in decreased efficiency in the utilization of applied N and often in lower crop yields. Of the various management techniques available to reduce N losses, previous studies with spring‐applied N suggested that inhibiting nitrification of applied ammonium with specific chemicals appears to be most compatible with current fertilization and crop production practices. We tested the effectiveness of a specific nitrification inhibitor, 2‐chloro‐6‐(trichloromethyl)pyridine (nitrapyrin), in reducing losses of fall‐applied N by comparing the growth, disease incidence, and yield of corn growing in field plots receiving anhydrous ammonia with those treated with anhydrous ammonia containing the inhibitor.Three field experiments on two soil types (Typic Argivdoll coarse‐loamy, mixed mesic and Vertic Halpla‐quoll fine, montmorillonitic, mesic) demonstrated...

Agronomy Journal, 1984

... that swine manure is an excellent organic fertilizer for corn (Zea mays L.) when applied at a... more ... that swine manure is an excellent organic fertilizer for corn (Zea mays L.) when applied at appropriate rates (Kornegay et al., 1976; Evans et al., 1977; Sutton et al ... Addition of ni-trapyrin at rates of 25 or 50 mg Ll of swine manure applied to soil at a rate of 110 Mg ha-', had no sig-...

Potassium in Agriculture, 2015

Manganese in Soils and Plants, 1988

Plant nutrition, although frequently unrecognized, has always been an important component of dise... more Plant nutrition, although frequently unrecognized, has always been an important component of disease control. The effects on disease of crop rotation, crop sequence, liming for pH adjustment, irrigation, and organic amendments such as manure are frequently through nutritional interactions as much as other factors. These practices supply nutrients directly, or render them more or less readily available for plant uptake through altered solubility or modified microbial activity. The effect of microbial activity and environment also may obscure the role of a specific element. The generally adequate availability of most nutrients for plant growth has induced an apathetic attitude toward the vital role of minerals in disease resistance. This is especially true for Mn which, although recognized as an essential element, has received most attention because of its potential toxicity.

ASA Special Publication, 2015

Plant Disease, 1993

... Auteur(s) / Author(s). HUBER DM ; MCCAY-BUIS TS ; Affiliation(s) du ou des auteurs / Author(s... more ... Auteur(s) / Author(s). HUBER DM ; MCCAY-BUIS TS ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s). Purdue univ., West Lafayette IN, ETATS-UNIS Revue / Journal Title. Plantdisease ISSN 0191-2917 CODEN PLDIDE Source / Source. 1993, vol. 77, n o 5, pp. ...

Phytopathology, 1995

... Most of the evidence supporting the re-lationship between the Mn status of the plant and ... ... more ... Most of the evidence supporting the re-lationship between the Mn status of the plant and ... Bimessite was chosen because it is a common Mn oxide mineral in soils (15) and ... Pages 31-50 in:Biomineralization Processes of Iron and Manganese: Modern and Ancient Environments. ...